Belvedere, 22, was shot at least twice outside Macy’s at Westfield Mission Valley mall on Dec. 24 and died of his wounds later that week. His brother’s fiancée, Ilona Flint, 22, also was shot in the head and torso. She managed to call 911 before she died.

San Diego homicide investigators are looking for Belvedere’s 24-year-old brother, Gianni, as a missing person last seen at his Tierrasanta home the night before the slayings. They have not named him as a suspect in the double homicide. They said they have ruled out robbery as a motive but have not offered an alternative.

Flint was remembered Saturday at a vigil at La Jolla Shores.

Crime Stoppers is offering a reward of up to $1,000 for information that leads authorities to Gianni Belvedere.

He is described as 6 feet tall, 165 pounds, with brown hair and eyes. He may be driving a four-door, dark green 2004 Toyota Camry XLE with Utah license plate B154VZ.

Anyone with information about him may call police at (619) 531-2293 or Crime Stoppers at (888) 580-8477, or send an email to sdcrimestoppers.com.